Malicious PDF — malware analysis report

Static analysis result for SHA-256 9623410b159d9cc5…

MALICIOUS

PDF

55.5 KB Created: 2020-08-11 05:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfe49c829df83db3166f0a8f12ea72c4 SHA-1: 42d4ec225d30e7382e5b9995f6b6784d48c822e2 SHA-256: 9623410b159d9cc5f658fa4543d30ea98a20520c5aeaf8e5afa94db73445cf5d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=sensory+evaluation+of+food+pdf+download'. This URL is presented within the document body as a lure for a PDF download. The ML classifier also strongly flagged this PDF as malicious. The combination of these factors indicates a phishing attempt designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=sensory+evaluation+of+food+pdf+download
    • http://files.oslutheran.com/uploads/1/3/1/4/131483249/dulifeduzasuzafufa.pdf
    • http://files.bhutaniowa.org/uploads/1/3/0/7/130776795/janokakag-fizoregojave.pdf
    • http://files.heroinetheplay.com/uploads/1/3/2/3/132302868/58ef0b9933a.pdf
    • https://cdn.shopify.com/s/files/1/0430/1773/2249/files/indesign_smaller_size.pdf
    • https://cdn.shopify.com/s/files/1/0439/8897/5774/files/23395905578.pdf
    • https://cdn.shopify.com/s/files/1/0434/1897/6414/files/rovatak.pdf
    • https://cdn.shopify.com/s/files/1/0435/5552/0667/files/dunake.pdf
    • https://cdn.shopify.com/s/files/1/0436/8649/4361/files/the_age_of_sustainable_development_jeffrey_sachs_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/33841779443.pdf
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/aaai_isma_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/6594/7800/files/69393109448.pdf
    • https://cdn.shopify.com/s/files/1/0428/4550/3655/files/index_page_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/11660390056.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/visatutasijunokuzos.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000992c.bin
f374d29481df11652f0eaa8e5ae7cadeac023541cae5284cb482c92618ac75e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x992C 5392 bytes
font_01_sfnt_off0000aba8.bin
c492c30214415fcf01bce408c78733ab508973091d80604e6e9739cee57c5c63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABA8 11208 bytes

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